package com.atguigu.rabbitmq.eight;

import com.atguigu.rabbitmq.utils.RabbitMqUtils;
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

/**
 * 死信队列实战
 * 消费者1
 * @author 连志阳
 * @since 2022/2/9
 */
public class Consumer01 {
    //普通交换机名称
    public static final String NORMAL_EXCHANGE = "normal_exchange";
    //死信交换机名称
    public static final String DEAD_EXCHANGE = "dead_exchange";
    //普通队列名称
    public static final String NORMAL_QUEUE = "normal_queue";
    //死信队列名称
    public static final String DEAD_QUEUE = "dead_queue";
    
    public static void main(String[] args) throws Exception{
        Channel channel = RabbitMqUtils.getChannel();
        //声明死信和普通交换机，类型为direct
        channel.exchangeDeclare(NORMAL_EXCHANGE, BuiltinExchangeType.DIRECT);
        channel.exchangeDeclare(DEAD_EXCHANGE, BuiltinExchangeType.DIRECT);
        //声明普通队列
        Map<String, Object> arguments = new HashMap<>();
        //过期时间，一般在生产者那边设置，比较灵活
        //arguments.put("x-message-tt1", 10000);
        //正常队列设置死信交换机
        arguments.put("x-dead-letter-exchange", DEAD_EXCHANGE);
        //设置死信RoutingKey
        arguments.put("x-dead-letter-routing-key", "lisi");
        //设置正常队列的长度限制
        //arguments.put("x-max-length", 6);
        channel.queueDeclare(NORMAL_QUEUE, false, false, false, arguments);
        
        //声明死信队列
        channel.queueDeclare(DEAD_QUEUE, false, false, false, null);
        
        //绑定普通的交换机和队列
        channel.queueBind(NORMAL_QUEUE, NORMAL_EXCHANGE, "zhangsan");
        //绑定死信的交换机和队列
        channel.queueBind(DEAD_QUEUE, DEAD_EXCHANGE, "lisi");
        System.out.println("等待接收消息......");
        
        DeliverCallback deliverCallback = (consumerTag, message) -> {
            String msg = new String(message.getBody(), StandardCharsets.UTF_8);
            if (msg.equals("info5")) {
                System.out.println("Consumer01接收的消息是：" + msg + "，此消息是被C1拒绝的");
                channel.basicReject(message.getEnvelope().getDeliveryTag(), false);
            } else {
                System.out.println("Consumer01接收的消息是：" + msg);
                channel.basicAck(message.getEnvelope().getDeliveryTag(), false);
            }
        };
        //开启手动应答
        channel.basicConsume(NORMAL_QUEUE, false, deliverCallback, consumerTag -> {});
        
    }
    
    


}
